Self-locking concrete-form clamp



Dec. 18 1923. 1,472,974

A. L. MOORE SELF LOCKING CONCRETE FORM CLAMP Filed Nov. 22, 1922 wiTNEssEs: f

Patented Dec. I8, 1923.

; STATES AMBROSE LARKIN MOORE, OF NEW ORLEANS, LOUISIANA.

SELF-LOCKING CONCRETE-FORM CLAMP.

Application filed November 22, 1922.

T all whom it may concern:

Be it known that I, r-iixrnnosn LARKIN Moons, a citizen of the United States, re siding at New Orleans, in the parish of Orleans and State of Louisiana, have invented a new Self-Locking Concrete-Form Clamp, of which the following is a specification.

My invention relates to an improvement in m a concrete form clamp in which the clamp is simple in construction and assembly, and can be placed into position and detached very easily and quickly.

The objects of my improvement are to provide a clamp that, first, is easily and quickly placed into position and detached, second, is sure and positive in its performame of duty, third, has no parts that can be lost or easily destroyed, fourth, locks itself when forced against form.

I attain these objects by the illustrations in the accompanying drawings, in which Figure 1 is reduced profile view of clamp in position on rod and against form. Figure 2, an end view of clamp. Figure 3, a plan view of clamp. Figure 4, a sectional side view of clamp showing one type of cam and Figure 5, a sectional side view of clamp showing another type of cam. Similar numerals refer to similar parts throughout the five illustrations.

Referring to drawing:

Body or casting (1) is the housing for cam (2) and pin It is shaped as per drawing with hole for pin (4) a short distance above center and slot (7) behind flange (8), in which slot cam (2) moves and through same slot (7) rod (10) is passed. Body (1) has enlarged face in front, form ing flange (8) of body Body (1) with flange (8) is preferably made of cast iron. Flange (8) has hole through it near center, to allow rod (10) to pass through' Cam (2), preferably made of steel, has teeth (6) on circular face of bottom and depression (5) to allow cam (2) to move freely without striking flange (8) before it can move forward enough to allow cam (2) to be forced back by form Cam (2) has hole in eccentric position so that cam (2) will move n eccentrical motion which causes cam (2) to bite tightly on to rod (10) through pressure transmitted from form. Pin (4) or axle on which cam (2) moves, passes through holes Serial No. 602,593.

in body (1) and cam (2) and is headed or mashed on both ends to prevent it from falling out of body (1).

In Figure 5 is shown cam whose performance of duty is same as that of cam (2), but, shape of gripping surface (6 and 6 is different to accommodate rod of limited diameter. Teeth (6 and 6) act similar to teeth (6) on cam In Figure l the clamp is shown on rod (10), which is passed through hole in clamp 5 and is tight against form The clamp is pressed against the form by an instrument, now in use, pressing against back of clamp at l hen top corner (2) of cam (2) is pressed against form (9) cam (2) is forted partly around and teeth (6) of cam (2) be gin to bite in rod (10) so that when a pressure is transmitted from form (9) against clamp, at flange (8) the cam (2) presses downward on rod (10) and prevents clamp 7 from slipping on rod (10). The more pressure form (9) transmits against clamp, the tighter the cam (2) holds rod (10) with teeth (6). To remove clamp from rod (10), knock cam (2) at corner (2 towards form (9) so that teeth (6) will not be touching rod (10).

I am aware that, prior to my invention, form clamps have been made and I, therefore, do not claim such as my invention, but I claim:

1. In a device of the class described, a clamp which locks itself to the tie member by the pressure of the form against one end of a pivoted lever whose other end presses against said tie member and retains grip on tie member until said lever is loosened.

2. In a device of the class described, a clamp provided with a pivoted lever, one end of which presses and grips the tie memher when the other end is pressed back by the form.

3. In a device of the class described, a clamp, whose body contains a hole through which the tie member can pass, and over said hole a lever is pivoted, one end of which lever is pressed back by form or mold, causing the other end which is toothed, to grip tie member.

AMBROSE LARKIN MOORE.

Witnesses:

HENRY H. BATE,

B. G. ALDRIDGE. 

